A Researcher Using the Twin-Study Method Finds an Average Correlation

question 61

Multiple Choice

A researcher using the twin-study method finds an average correlation of .50 between monozygotic twins' scores on a measure of self-esteem. The researcher finds an average correlation of .30 between dizygotic twins' scores on this measure. The difference between the size of the correlations is statistically significant. What conclusion might the researcher draw from these results?

• A) Genetics has more of an influence on self-esteem than environment has.
• B) There is evidence for a genetic influence on self-esteem.
• C) There is no evidence for a genetic influence on self-esteem.
• D) The results are opposite of what would be expected if there were a genetic influence on self-esteem.

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Definitions:

Facial Expressions

Visible changes in the face that express a person's emotions, intentions, or social signals, often studied in psychology and neuroscience.

Visual Stimuli

Objects or conditions within the environment that can be seen and thus influence a person's behavior or cognitive processes.

Newborn Baby

An infant in the initial period after birth, often considered to be the first four weeks of life, characterized by rapid physical and neurological development.

Visual Acuity

The sharpness or clarity of vision, usually measured by the ability to discern letters or numbers at a given distance according to a fixed standard.